Nothing
library(shiny)
library(leaflet)
library(leaflet.extras2)
# content <- "https://raw.githubusercontent.com/danwild/leaflet-velocity/master/demo/wind-global.json"
# content <- "https://raw.githubusercontent.com/danwild/leaflet-velocity/master/demo/water-gbr.json"
content <- "https://raw.githubusercontent.com/danwild/leaflet-velocity/master/demo/wind-gbr.json"
ui <- fluidPage(
leafletOutput("map", height = "800px")
, actionButton("showGroup", "showGroup")
, actionButton("hideGroup", "hideGroup")
, actionButton("removeVelocity", "removeVelocity")
, actionButton("clearGroup", "clearGroup"), br()
, actionButton("setOptions", "setOptions")
)
server <- function(input, output, session) {
output$map <- renderLeaflet({
leaflet() %>%
addTiles(group = "base") %>%
setView(145, -20, 4) %>%
addVelocity(content = content, group = "Wind", layerId = "veloid",
options = velocityOptions(
position = "bottomright",
emptyString = "Nothing to see",
speedUnit = "k/h",
lineWidth = 2,
colorScale = rainbow(12))) %>%
addLayersControl(baseGroups = "base", overlayGroups = "Wind")
})
observeEvent(input$showGroup, {
leafletProxy("map") %>%
showGroup("Wind")
})
observeEvent(input$hideGroup, {
leafletProxy("map") %>%
hideGroup("Wind")
})
observeEvent(input$removeVelocity, {
leafletProxy("map") %>%
removeVelocity("veloid")
})
observeEvent(input$clearGroup, {
leafletProxy("map") %>%
clearGroup("Wind")
})
observeEvent(input$setOptions, {
leafletProxy("map") %>%
setOptionsVelocity(layerId = "veloid", options = velocityOptions(
position = "topleft",
emptyString = "There is no wind",
speedUnit = "m/s",
lineWidth = 4,
colorScale = heat.colors(12),
particleAge = 10
))
})
}
shinyApp(ui, server)
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